Here is some of the guidelines I am using from a plasma website, I posted there link below.
Plasma TV Break-In
Break-in consists of a set of steps you should make right after you bought your plasma TV. Its purpose is to slowly prepare the TV for regular watching. During the break-in period, you will have to limit yourself a bit in regard to how you use your plasma TV. The break-in should be performed for the first 100-200 hours of operation. You can perform it exclusively or integrate it between your regular TV watching hours. During these 100-200 hours, the plasma TV is prone to accelerated burn-in because the pixels are fresh and fire at maximum intensity.
•Select the appropriate mode when you first power up your plasma TV. Most modern plasma TVs ask if you are going to use them in a store or in your home. In “store” they are in “torch mode” having maximum contrast and brightness to overcome the extreme lighting and look good.
•Calibrate them or use the appropriate picture mode. Some of the models have a picture mode in which they offer best picture quality. Others need to be calibrated manually to obtain best picture. Whether you select just the picture mode or you calibrate them, the brightness and contrast should not be maximum but around 50-60%.
•Watch only full-screen content. Avoid watching 4:3 content or use the zoom function to make it fill the screen. Same for cinemascope content which is shorter than the screen and puts black bars at top and bottom of the picture. If you have to watch non full-screen content at least make the sidebars or top and bottom bars gray instead of black.
•Don’t play games on it and don’t use it as a computer monitor.
•Mix the content. If you are watching programs that have logo, news ticker or any other static elements don’t leave the TV on the same channel for more than an hour. Ideally avoid watching such programs in the first hours.
•Don’t pause for long times, don’t leave your DVD menu paused on screen, etc.
You can use the white wash function, if present, for the first few hours in order to wear out the pixels a bit. Then you can watch regular content, sticking to the rules described above. You can perform the break-in in one continuous run for the first 100-200 hours if you are patient enough. If you don’t however, watch regular content whenever you want and when you’re not in front of the TV (eating, sleeping, away) leave on the white wash or a full-screen program/movie without logo or other static content. Note that if using white wash function, you should do so for less time than the recommended 100-200 hours since it wears out the pixels at an accelerated pace and it accomplishes the same thing faster. Ideally you should use the white wash for the first hour and after that watch regular full-screen content without static parts.
The break-in process is recommended. However not everybody does it. Most people probably don’t bother with it and still don’t get permanent burn-in. It is however an extra safety measure, and I think it’s worth doing it.
They also have some other good tips about plasma. Once you read it scroll down and there is a Q&A section.http://www.thebestplasmatv.com/guide...ma-tv-burn-in/